SyntaxError: Unexpected end of JSON input when trying to query transaction details from the hyperledger 2.2 語法錯誤：JSON 輸入的意外結束嘗試從 hyperledger 2.2 查詢交易詳細信息
[英]SyntaxError: Unexpected end of JSON input when trying to query transaction details from the hyperledger 2.2
問題描述
我正在嘗試在 .hyperledger 2.2 上運行獎勵示例。 合約打包部署成功。 我還能夠成功運行該應用程序並注冊管理員和用戶。
鏈碼成功部署：
Committed chaincode definition for chaincode 'customerloyalty' on channel 'mychannel':
Version: 1.0, Sequence: 1, Endorsement Plugin: escc, Validation Plugin: vscc, Approvals: [Org1MSP: true, Org2MSP: true]
Query chaincode definition successful on peer0.org2 on channel 'mychannel'
注冊管理員成功：
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Successfully enrolled admin user "admin" and imported it into the wallet
能夠成功注冊用戶：
app running on port: 8000
Using param - firstname: Test lastname: User email: test@example.com phonenumber: 111-111-1111 accountNumber: 123456 cardId: 123
Valid Entries
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Successfully registered and enrolled admin user 123 and imported it into the wallet
admin user admin disconnected
Submit Create Member transaction.
createMemberResponse:
{
accountNumber: '123456',
firstName: 'Test',
lastName: 'User',
email: 'test@example.com',
phoneNumber: '111-111-1111',
points: 0
}
Get member state
memberResponse.parse_response:
{
accountNumber: '123456',
firstName: 'Test',
lastName: 'User',
email: 'test@example.com',
phoneNumber: '111-111-1111',
points: 0
}
memberData using param - accountNumber: 123456 cardId: 123
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Get member state
{
accountNumber: '123456',
firstName: 'Test',
lastName: 'User',
email: 'test@example.com',
phoneNumber: '111-111-1111',
points: 0
}
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
但是，當我嘗試在應用程序中獲取交易信息時，出現以下錯誤且沒有來自同行的響應：
Get use points transactions state for member 123456
2023-01-05T21:28:46.042Z - error: [Transaction]: Error: No valid responses from any peers. Errors:
peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
at getResponsePayload (/../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Object.usePointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:592:41)
Error: No valid responses from any peers. Errors:
peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Object.usePointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:592:41) {
responses: [
{
version: 0,
timestamp: null,
response: [Object],
payload: <Buffer >,
endorsement: null,
connection: [Object],
peer: 'peer0.org1.example.com:7051'
},
{
version: 0,
timestamp: null,
response: [Object],
payload: <Buffer >,
endorsement: null,
connection: [Object],
peer: 'peer0.org2.example.com:9051'
}
],
errors: []
}
Wallet path: ../fabric-samples/asset-transfer-basic/application-customerloyalty/wallet
Get earn points transactions state for member 123456
2023-01-05T21:28:46.192Z - error: [Transaction]: Error: No valid responses from any peers. Errors:
peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Object.earnPointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:545:25)
Error: No valid responses from any peers. Errors:
peer=peer0.org1.example.com:7051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
peer=peer0.org2.example.com:9051, status=500, message=error in simulation: transaction returned with failure: SyntaxError: Unexpected end of JSON input
at newEndorsementError (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:74:12)
at getResponsePayload (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:41:23)
at Transaction.submit (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/fabric-network/lib/transaction.js:255:28)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Object.earnPointsTransactionsInfo (../fabric-samples/asset-transfer-basic/application-customerloyalty/network/network.js:545:25) {
responses: [
{
version: 0,
timestamp: null,
response: [Object],
payload: <Buffer >,
endorsement: null,
connection: [Object],
peer: 'peer0.org1.example.com:7051'
},
{
version: 0,
timestamp: null,
response: [Object],
payload: <Buffer >,
endorsement: null,
connection: [Object],
peer: 'peer0.org2.example.com:9051'
}
],
errors: []
}
node:internal/errors:484
ErrorCaptureStackTrace(err);
^
Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
at new NodeError (node:internal/errors:393:5)
at ServerResponse.setHeader (node:_http_outgoing:644:11)
at ServerResponse.header (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:794:10)
at ServerResponse.send (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:174:12)
at ServerResponse.json (../fabric-samples/asset-transfer-basic/application-customerloyalty/node_modules/express/lib/response.js:278:15)
at ../fabric-samples/asset-transfer-basic/application-customerloyalty/app.js:278:37
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
code: 'ERR_HTTP_HEADERS_SENT'
}
上面的日志表明 json 語法在調用 submitTransaction function 的 .network.js 文件中不正確。Network.js 文件的摘錄是：
/*
* Get all EarnPoints transactions data
* @param {String} cardId Card id to connect to network
*/
earnPointsTransactionsInfo: async function (cardId, userType, userId) {
// Create a new file system based wallet for managing identities.
const walletPath = path.join(process.cwd(), '/wallet');
const wallet = await Wallets.newFileSystemWallet(walletPath);
console.log(`Wallet path: ${walletPath}`);
try {
// Create a new gateway for connecting to our peer node.
const gateway2 = new Gateway();
await gateway2.connect(ccp, { wallet, identity: cardId, discovery: gatewayDiscovery });
// Get the network (channel) our contract is deployed to.
const network = await gateway2.getNetwork('mychannel');
// Get the contract from the network.
const contract = network.getContract('customerloyalty');
console.log(`\nGet earn points transactions state for ${userType} ${userId}`);
//for debug only
console.log(await contract.submitTransaction('EarnPointsTransactionsInfo', 'userType', 'userId'));
//
let earnPointsTransactions = await contract.submitTransaction('EarnPointsTransactionsInfo', userType, userId);
//for debug only
console.log(await contract.submitTransaction('EarnPointsTransactionsInfo', userType, userId));
//
earnPointsTransactions = JSON.parse(earnPointsTransactions.toString());
console.log(earnPointsTransactions);
// Disconnect from the gateway.
await gateway2.disconnect();
return earnPointsTransactions;
}
catch(err) {
//print and return error
console.log(err);
let error = {};
error.error = err.message;
return error;
}
},
usePointsTransactionsInfo: async function (cardId, userType, userId) {
// Create a new file system based wallet for managing identities.
const walletPath = path.join(process.cwd(), '/wallet');
const wallet = await Wallets.newFileSystemWallet(walletPath);
console.log(`Wallet path: ${walletPath}`);
try {
// Create a new gateway for connecting to our peer node.
const gateway2 = new Gateway();
await gateway2.connect(ccp, { wallet, identity: cardId, discovery: gatewayDiscovery });
// Get the network (channel) our contract is deployed to.
const network = await gateway2.getNetwork('mychannel');
// Get the contract from the network.
const contract = network.getContract('customerloyalty');
console.log(`\nGet use points transactions state for ${userType} ${userId}`);
let usePointsTransactions = await contract.submitTransaction('UsePointsTransactionsInfo',userType, userId);
usePointsTransactions = JSON.parse(usePointsTransactions.toString());
console.log(usePointsTransactions);
// Disconnect from the gateway.
await gateway2.disconnect();
return usePointsTransactions;
}
我嘗試使用 docker logs <container name> 檢查來自對等方的日志：
2023-01-05 22:28:46 2023-01-05T21:28:46.023Z error [c-api:contracts-spi/chaincodefromcontract.js] [mychannel-fedc897c] SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46 2023-01-05T21:28:46.033Z error [c-api:lib/handler.js] [mychannel-fedc897c] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46 at JSON.parse (<anonymous>)
2023-01-05 22:28:46 at CustomerLoyalty.UsePointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:110:29)
2023-01-05 22:28:46 at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:28:46 at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:28:46 at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer
2023-01-05 22:28:46 2023-01-05T21:28:46.181Z error [c-api:contracts-spi/chaincodefromcontract.js] [mychannel-644303c3] SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46 2023-01-05T21:28:46.184Z error [c-api:lib/handler.js] [mychannel-644303c3] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:28:46 at JSON.parse (<anonymous>)
2023-01-05 22:28:46 at CustomerLoyalty.EarnPointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:89:29)
2023-01-05 22:28:46 at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:28:46 at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:28:46 at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer
2023-01-05 22:32:51 2023-01-05T21:32:51.616Z info [c-api:lib/handler.js] [mychannel-68bdfcd2] Calling chaincode Invoke() succeeded. Sending COMPLETED message back to peer
2023-01-05 22:32:53 2023-01-05T21:32:53.977Z error [c-api:contracts-spi/chaincodefromcontract.js] [mychannel-7f185a49] SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:53 2023-01-05T21:32:53.989Z error [c-api:lib/handler.js] [mychannel-7f185a49] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:53 at JSON.parse (<anonymous>)
2023-01-05 22:32:53 at CustomerLoyalty.UsePointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:110:29)
2023-01-05 22:32:53 at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:32:53 at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:32:53 at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer
2023-01-05 22:32:54 2023-01-05T21:32:54.195Z error [c-api:contracts-spi/chaincodefromcontract.js] [mychannel-44d04ba9] SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:54 2023-01-05T21:32:54.197Z error [c-api:lib/handler.js] [mychannel-44d04ba9] Calling chaincode Invoke() returned error response [SyntaxError: Unexpected end of JSON input
2023-01-05 22:32:54 at JSON.parse (<anonymous>)
2023-01-05 22:32:54 at CustomerLoyalty.EarnPointsTransactionsInfo (/usr/local/src/lib/customerloyalty.js:89:29)
2023-01-05 22:32:54 at processTicksAndRejections (node:internal/process/task_queues:96:5)
2023-01-05 22:32:54 at async ChaincodeFromContract.invokeFunctionality (/usr/local/src/node_modules/fabric-shim/lib/contract-spi/chaincodefromcontract.js:378:32)
2023-01-05 22:32:54 at async handleMessage (/usr/local/src/node_modules/fabric-shim/lib/handler.js:602:24)]. Sending ERROR message back to peer
這是智能合約腳本 customerloyalty.js：
'use strict';
const { Contract } = require('fabric-contract-api'); const allPartnersKey = 'all-partners'; const earnPointsTransactionsKey = 'earn-points-transactions'; const usePointsTransactionsKey = 'use-points-transactions';
class CustomerLoyalty extends Contract {
// Init function executed when the ledger is instantiated
async instantiate(ctx) {
console.info('============= START : Initialize Ledger ===========');
await ctx.stub.putState('instantiate', Buffer.from('INIT-LEDGER'));
await ctx.stub.putState(allPartnersKey, Buffer.from(JSON.stringify([])));
await ctx.stub.putState(earnPointsTransactionsKey, Buffer.from(JSON.stringify([])));
await ctx.stub.putState(usePointsTransactionsKey, Buffer.from(JSON.stringify([])));
console.info('============= END : Initialize Ledger ===========');
}
// Add a member on the ledger
async CreateMember(ctx, member) {
member = JSON.parse(member);
await ctx.stub.putState(member.accountNumber, Buffer.from(JSON.stringify(member)));
return JSON.stringify(member);
}
// Add a partner on the ledger, and add it to the all-partners list
async CreatePartner(ctx, partner) {
partner = JSON.parse(partner);
await ctx.stub.putState(partner.id, Buffer.from(JSON.stringify(partner)));
let allPartners = await ctx.stub.getState(allPartnersKey);
allPartners = JSON.parse(allPartners);
allPartners.push(partner);
await ctx.stub.putState(allPartnersKey, Buffer.from(JSON.stringify(allPartners)));
return JSON.stringify(partner);
}
// Record a transaction where a member earns points
async EarnPoints(ctx, earnPoints) {
earnPoints = JSON.parse(earnPoints);
earnPoints.timestamp = new Date((ctx.stub.txTimestamp.seconds.low*1000)).toGMTString();
earnPoints.transactionId = ctx.stub.txId;
let member = await ctx.stub.getState(earnPoints.member);
member = JSON.parse(member);
member.points += earnPoints.points;
await ctx.stub.putState(earnPoints.member, Buffer.from(JSON.stringify(member)));
let earnPointsTransactions = await ctx.stub.getState(earnPointsTransactionsKey);
earnPointsTransactions = JSON.parse(earnPointsTransactions);
earnPointsTransactions.push(earnPoints);
await ctx.stub.putState(earnPointsTransactionsKey, Buffer.from(JSON.stringify(earnPointsTransactions)));
return JSON.stringify(earnPoints);
}
// Record a transaction where a member redeems points
async UsePoints(ctx, usePoints) {
usePoints = JSON.parse(usePoints);
usePoints.timestamp = new Date((ctx.stub.txTimestamp.seconds.low*1000)).toGMTString();
usePoints.transactionId = ctx.stub.txId;
let member = await ctx.stub.getState(usePoints.member);
member = JSON.parse(member);
if (member.points < usePoints.points) {
throw new Error('Member does not have sufficient points');
}
member.points -= usePoints.points;
await ctx.stub.putState(usePoints.member, Buffer.from(JSON.stringify(member)));
let usePointsTransactions = await ctx.stub.getState(usePointsTransactionsKey);
usePointsTransactions = JSON.parse(usePointsTransactions);
usePointsTransactions.push(usePoints);
await ctx.stub.putState(usePointsTransactionsKey, Buffer.from(JSON.stringify(usePointsTransactions)));
return JSON.stringify(usePoints);
}
// Get earn points transactions of the particular member or partner
async EarnPointsTransactionsInfo(ctx, userType, userId) {
let transactions = await ctx.stub.getState(earnPointsTransactionsKey);
transactions = JSON.parse(transactions);
let userTransactions = [];
for (let transaction of transactions) {
if (userType === 'member') {
if (transaction.member === userId) {
userTransactions.push(transaction);
}
} else if (userType === 'partner') {
if (transaction.partner === userId) {
userTransactions.push(transaction);
}
}
}
return JSON.stringify(userTransactions);
}
// Get use points transactions of the particular member or partner
async UsePointsTransactionsInfo(ctx, userType, userId) {
let transactions = await ctx.stub.getState(usePointsTransactionsKey);
transactions = JSON.parse(transactions);
let userTransactions = [];
for (let transaction of transactions) {
if (userType === 'member') {
if (transaction.member === userId) {
userTransactions.push(transaction);
}
} else if (userType === 'partner') {
if (transaction.partner === userId) {
userTransactions.push(transaction);
}
}
}
return JSON.stringify(userTransactions);
}
// get the state from key
async GetState(ctx, key) {
let data = await ctx.stub.getState(key);
let jsonData = JSON.parse(data.toString());
return JSON.stringify(jsonData);
}
module.exports = CustomerLoyalty;`
似乎 json.stringify 存在語法錯誤。 我不知道下一步該怎么做，或者如何解決這個問題。 有任何想法嗎？
2 個解決方案
解決方案1
0 已采納 2023-01-06 11:09:48
我懷疑您從未調用過實例化事務 function，因此earnPointsTransactionsKey分類帳密鑰不包含任何數據：
% node --eval="JSON.parse(Buffer.from(''))"
SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
與其依賴初始化事務來有效地設置空的初始值 state，不如考慮在智能合約中使用助手 function，如下所示：
async getEarnPointsTransactions(ctx) {
const data = await ctx.stub.getState(earnPointsTransactionsKey);
if (!data || data.length === 0) {
return [];
}
return JSON.parse(data);
}
還要考慮更新分類帳的所有交易都在修改earnPointsTransactionsKey分類帳鍵的值。 隨着負載的增加，這將引入爭用，並且您可能會遇到 MVCC_READ_CONFLICT 失敗，因為事務同時更新此 state。可以通過在客戶端應用程序中實現提交重試邏輯來緩解這些失敗。 您可能會考慮不同的實施方法，例如：
解決方案2
0 2023-01-20 21:28:33
此錯誤消息表明HTTP 響應的標頭已發送到客戶端且無法修改。 這通常發生在響應已發送到客戶端並嘗試發送另一個響應時。 代碼中引發此錯誤的具體位置是“express”庫中“response.js”文件中的“ServerResponse.header”，導致該問題的具體 function 是“UserController”中的“register” .js" 在第 60 行。
UnhandledPromiseRejectionWarning: SyntaxError: Unexpected end of JSON 輸入
[英]UnhandledPromiseRejectionWarning: SyntaxError: Unexpected end of JSON input
SyntaxError：JSON.parse 處的 JSON 輸入意外結束（<anonymous> )</anonymous>
[英]SyntaxError: Unexpected end of JSON input at JSON.parse (<anonymous>)
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